Heater for injectors.



H. EL HASKELL. HEATER POB INJEGTORS.

APPLIOATION FILED APR. 2e, 1912.

Patented July 1,;1913.

tiri1 strains HEATER FOR INJECTORS. i

Specification of ALetters Patent.

Patented July 1, 1913.

Application filed April 26, 1,912. Serial No. 693,359.

` Injectors, of which the tollowingis a full,

clear, and exact description.

My linvention relates to injectors, and it has for its object to providea heater which 'will automatically heat the injector, Vwhen it 1s not 1nuse, thereby preventing anyl freezing in the p ipes.

`Additional ob ects of the invention will appear in the followingcomplete .specifica-v tion, in which the preferred Vform of the:

invention is disclosed.

In the drawings, similar characters of reference indicate correspondingparts in all the views, in which-i Figure 1 is a. side sectionalelevation of an injector of the Strain-Locke type, which is providedwith my heater; Fig. 2 is a plan view showing the top of the check valvechamber, with the arm and the connecting link;l and Fig. 3 is a.vertical sectional view" of the operating lever.

By referring to the drawings it will be seen that the injector is of thewell-known type, with the steam valve 5, steam tube 6, combining tube 7,combining tube cage 8, delivery tube 9, delivery tube ring 10, watersupply pipe 11, commanded by the water gate l2, an overflow pipe 13, anda steam pipe 14. The steam valve 5 has a valve stem 15, with alongitudinal opening 16 therein, the longitudinal opening extendingthrough the valve 5. Communication is normally afforded between thesteam pipe 14, and the longitudinal passage16, in the valve stem 15, bythe lateral openings 17, in the valve stem 15, these lateral openings 17permitting steam to flow from the steam pipe 14, .through the valve 5,to keep the pipes heated, and prevent freezing when the steam valve 5seat 18. There is a thread. 19 in thelongitudinal passage 16 in thevalve stem 15, and meshing with this thread 19 there is a thread 20, ona valve member 21, the said valve member 21 being adapted to close thelateral openings 17 in the valve stem 15, when desired. The outerterminal 'of the valve member 21 is provided with a grip member 22, bywhich it may be rotated, when the engineer desires to close the lateralis seated on the steamvalve' openings 17. There is also a lock thumb nut23, which meshes with the thread 20 on the valve member 21, to lock thevalve member 21 in position relatively to the valve stem 15. Secured tothe valve stem 15, there is a bracket 24, which is provided with iianges25, having orifices 26, the said bracket 24 being disposed within theyoke 27 on an operatingy lever 28. The orifices 26 register with theorifices 29, in the yoke, and in these oriices 26 and 29 there aredisposed bolts 30, by which means thc bracket 25 is held in position inthe yoke. The operating lever 28, is ulcrumed to an arm 31, secured tothe casing 32 of the injector. The overow 13 is provided with the usualcheck valve casing 33. lVith a thread 34 in this casing 33, there meshesa threaded flange 35, on the head 36. This head 36 has a sleeve 37, withan inner thread in which meshes an outer thread on a sleeve 38. rlhecheck valve 39 has ak valve stem 40, which is disposed in the sleeve 38.It will be understood that when this sleeve 38 is rotated, it willengage the check valve 39, and hold it on the check valve seat 41. Thearm 42 is secured to the sleeve 38 by the screw member 43, which isdisposed through the eye in the eye member 44, on the arm 42. The screwmember 43 meshes with an inner thread in the sleeve 38. To this arm 42there is articulated a link 45, the link 45 being connected with theoperating lever 28, by means ot the bolt 46, which is disposed throughthe slot 47 in the said operating lever 28.

Vhen the elements are disposed as shown vand the valve stem 15, thelateral openings 17 will be closed by the vbushing 48, so that the fullsupply ot steam will pass unobstructed through the steam valve seat 18.At the same time that the operating lever 28 is moved to move the valve5 away from the valve seat 18, the link 45 will be moved to the right bythe operating lever 28, the link 45 moving the arm 42 to rotate thesleeve 38, and as the outer thread on the sleeve 38 rotates on the innerthread on the sleeve 37, it will be raised to free the check valve 39.By again moving the operating lever to seat the steam valve 5 on thesteam valve seat 1S,

the link l will again be moved by the 0perating lever to turn the sleeve3S down and against the check valve, to hold the check valve 39 onthecheck valve seat ll. After the lock thumb nut 33 has been moved, thelgrip member i9 may be turn-ed, when de` sired, to move the valve member2l to close the lateral openings 1.7, so that, when desired, the limitedsupply of steam may be cut oftn when the injector is not in use.

Having thus described my invention, I claim as new and desire to secureby Letters Patent:

l. In combination with an injector having a check valve, a steam valvehaving an opening for permitting the passage of a limited supply ofsteam when the steam valve is in position to cut ott the main steamsupply, a member for holding the cheek valve on its seat, and means foroperating the steam valve and the member simulta-l neously.

2. In a device of the class described, a steam valve seat, a steamvalvecommanding the seat and having a stem with an opening which extendsthrough the side vof the valve stem and also through the steam valve,and a valve member in the opening i-n the steam valve stem forcommanding the opening in;`

the side of the steam valve stem.

3. In combination with an injector having nected with the steam valvestem for operatv ing the steam valve, and means connecting the "leverwith the member for operating the latter.A

d. In combination with an injector having a steam valve seat and anoverflow, a sleeve having an inner thread, a .sleeve having an andhaving a valve stem disposed in the second-mentioned sleeve, one of thesleeves being adapted to engage the check valve,

when it is turned, a steam valve commanding the steam valve seat, andhaving a stem with an opening which extends through the side of thevalve stem, yand also through the steam valve, a valve member in theopening in the steam valve stem for commanding the lateral opening inthe side of the steam valve stem, and means for operating the steamvalve connected with the steam valve stem for `operatingthe steam valveand for operating the last-mentioned sleeve simultaneously. Y

5. In combination with an injector having a steam valve' seat and anoverflow, a sleeve having an inner thread, a sleeve having an outerthread meshing with the inner thread, a check valve connected with theoverflow, and having a valve stem disposed in the second-mentionedsleeve, one of the sleeves being adapted to engage the check valve, whenit is turned, a steam valve co1nmanding the steam valvevseat, and havinga stem with an opening which extends through the side of they valvestem, and also through the steam valve, a valve member in the opening inthe steam valve stem for commanding the lateral opening in the side ofthe steam valve stem, a lever for moving the steam valve stem to operatethe steam valve, an arm on the last-mentioned sleeve, and a linkconnecting the arm with the lever.

(3. In combination with an injector having a steam valve seat, a steamvalve commanding the seat, and having a stem with an opening, whichextends through the side-of the valve stem and also through the steamvalve, and a valve member in the opening in Ithe steam valve stem, forcommanding the opening in the side of the steam valve stem. In testimonywhereof I have signed my name to this specification in the presence oftwo subscribing witnesses. Y

IIOMER EMERSON IIASKELL.

Witnesses F. F. MoCULLoUGi-r, IVM. MARTIN.

yCopies of this rpatent may be obtained for five cents each, byaddressing the" Commissioner of Patents, Washington, D. C.

